Use relative units for sprite placement
Add slider to demo page to adjust font size
Update tests
Merge branch 'relative-sizing' of github.com:thomaswelton/gulp-svg-sprites into thomaswelton-relative-sizing
Fix bug with rendering at browser zoom levels
Fix IE rounding error by using ems
Merge branch 'relative-sizing' of github.com:thomaswelton/gulp-svg-sprites into thomaswelton-relative-sizing
Merge branch 'thomaswelton-relative-sizing'
Remove specs for preview page